Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccf258e36540a9c3…

MALICIOUS

PDF

94.3 KB Created: 2021-03-18 20:36:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 61adfb4c798c002a5e04ebabbdc9de1a SHA-1: 2c6c0feb94945a221b039b7828f905ca8d25e857 SHA-256: ccf258e36540a9c33ac57bb5a3ab5e9732b8fbe20d75c6d4400392bf9fafc54e
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to SEO-optimized redirectors and link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to drive traffic to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://pelibifir.ru/wix?keyword=ksp+manual+fuel+transfer PDF link annotation
    • https://mumetimobenuja.weebly.com/uploads/1/3/2/3/132302956/173019.pdfIn PDF document text
    • https://nizidisifa.weebly.com/uploads/1/3/4/5/134505067/nekizizozelit_jomigoxoduvi_dupivodu.pdfIn PDF document text
    • https://s3.amazonaws.com/lofese/assamese_baganiya_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/97633008206.pdfIn PDF document text
    • http://skidki-day.shop/samsung_uhd_tv_6290_40_inchg9igx.pdfIn PDF document text
    • http://kagaromorin.medianewsonline.com/suzilan.pdfIn PDF document text
    • https://s3.amazonaws.com/tikoweravisixu/decrypt9_3ds_guide.pdfIn PDF document text
    • http://fogafiv.mypressonline.com/xarivedetofa.pdfIn PDF document text
    • http://meetraisins.club/87385369208mni6h.pdfIn PDF document text
    • https://vujewixijul.weebly.com/uploads/1/3/1/4/131437312/fepibetaxovewa.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/wemivefenupetovi.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/layout_template_indd.pdfIn PDF document text
    • https://jawoxaze.weebly.com/uploads/1/3/0/9/130968973/2097349.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/billie_eilish_bellyache_sheet_music.pdfIn PDF document text
    • https://ninefajesazaga.weebly.com/uploads/1/3/5/3/135384029/pabovovewujut.pdfIn PDF document text
    • http://wdd13.ru/tivejemesuwawusu05aqj.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/bonusawaxowufat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001366a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1366A 5016 bytes
SHA-256: 7f82a47c57498124ae2be56c293d2e2fc3406a47e6050e346ae19a999f79ddce
font_01_sfnt_off00014765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14765 11128 bytes
SHA-256: ffbcc2645ceb91a2205103a7c3a4e8fb873fb390f89858b33f84cf23d029dbde

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